spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 33.87

burning thrust augmentor augmentation position if additional time to confirm ignition is necessary.
(ii) During the runs at any rated augmented thrust the hydraulic fluid temperature must be maintained at the
limiting temperature except where the
test periods are not long enough to
allow stabilization.
(iii) During the simulated supersonic
runs the fuel temperature and induction air temperature may not be less
than the limiting temperature.
(iv) The endurance test must be conducted with the fuel burning thrust
augmentor installed, with the primary
and secondary exhaust nozzles installed, and with the variable area exhaust nozzles operated during each run
according to the methods specified in
complying with Section 33.5(b).
(v) During the runs at thrust settings
for maximum continuous thrust and
percentages thereof, the engine must
be operated with the inlet air distortion at the limit for those thrust settings.
(b) Engines other than certain rotorcraft engines. For each engine except a
rotorcraft engine for which a rating is
desired under paragraph (c), (d), or (e)
of this section, the applicant must conduct the following runs:
(1) Takeoff and idling. One hour of alternate five-minute periods at rated
takeoff power or thrust and at idling
power or thrust. The developed powers
or thrusts at takeoff and idling conditions and their corresponding rotor
speed and gas temperature conditions
must be as established by the power
control in accordance with the schedule established by the applicant. The
applicant may, during any one period,
manually control the rotor speed,
power, or thrust while taking data to
check performance. For engines with
augmented takeoff power ratings that
involve increases in turbine inlet temperature, rotor speed, or shaft power,
this period of running at takeoff must
be at the augmented rating. For engines with augmented takeoff power
ratings that do not materially increase
operating severity, the amount of running conducted at the augmented rating is determined by the FAA. In
changing the power setting after each
period, the power-control lever must be

moved in the manner prescribed in
paragraph (b)(5) of this section.
(2) Rated maximum continuous and
takeoff power or thrust. Thirty minutes
at - 
(i) Rated maximum continuous power
or thrust during fifteen of the twentyfive 6-hour endurance test cycles; and
(ii) Rated takeoff power or thrust
during ten of the twenty-five 6-hour endurance test cycles.
(3) Rated maximum continuous power or
thrust. One hour and 30 minutes at
rated maximum continuous power or
thrust.
(4) Incremental cruise power or thrust.
Two hours and 30 minutes at the successive power lever positions corresponding to at least 15 approximately
equal speed and time increments between maximum continuous engine rotational speed and ground or minimum
idle rotational speed. For engines operating at constant speed, the thrust and
power may be varied in place of speed.
If there is significant peak vibration
anywhere between ground idle and
maximum continuous conditions, the
number of increments chosen may be
changed to increase the amount of running made while subject to the peak vibrations up to not more than 50 percent
of the total time spent in incremental
running.
(5) Acceleration and deceleration runs.
30 minutes of accelerations and decelerations, consisting of six cycles from
idling power or thrust to rated takeoff
power or thrust and maintained at the
takeoff power lever position for 30 seconds and at the idling power lever position for approximately four and onehalf minutes. In complying with this
paragraph, the power-control lever
must be moved from one extreme position to the other in not more than one
second, except that, if different regimes of control operations are incorporated necessitating scheduling of the
power-control lever motion in going
from one extreme position to the other,
a longer period of time is acceptable,
but not more than two seconds.
(6) Starts. One hundred starts must be
made, of which 25 starts must be preceded by at least a two-hour engine
shutdown. There must be at least 10

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